gistfile1.cs

void Main()
{
	var a = DoFoo().Result;
}

// Define other methods and classes here
public static async System.Threading.Tasks.Task<int> DoFoo()
{
    try
    {
        await Foo();
    }
    catch (ArgumentException ex)
    {
          /* The exception will be caught because you've awaited the call. */
		  Console.WriteLine("This line gets printed!");
    }
	
	return 12;
}

public static async System.Threading.Tasks.Task Foo()
{
    throw new ArgumentException("ex");
}